ndfather still plays tennis now and then, ________ he’s in his nineties.

What do you think of the lecture of LiYang’s Crazy English— I think it’s _______ , but someonethinks it’s much too ________.

John is ______ honest boy. He has ______ useful book.

We must ________ every chance we have to improve our communicating ability

______ they are most interested in is ______ they can produce more and bettercars